I used to employ someone who at first was a first class tradesman who got on well with his workmates and was a great timekeeper.
Over a period of approximately 6 months his time keeping started slipping, then I noticed his standard of work was way below its best. He began to become aggresive (verbally, not phyiscally) to his colleagues and became paranoid believing everyone at the company was against him, including myself (despite the fact I regulary lent him money to keep the bali*** at bay)
I noticed he had started to have that sickly sweet smell of weed about him and when challanged admitted he was up most nights smoking dope with some (unemployed) mates.
Not long after, he left my employment ( his choice) and I know he remained without work for at least 3 years (This was in 2007), after that I lost touch with him.
I saw first hand how cannabis can affect someone, maybe he was an exception, I don't claim to be an expert, but from what I saw what it did to him I would not recommend it to anyone.

them links from 2002, 02, 06, 07 pathetic alot of waters gone under the bridge since then alot of scientific evidence disproving them "MYTHS" sorry eggyeggcupshutup your going to have to do better than that i`m affrid :)

LOL EggyEggCup You are the typical prohibitionist. Couldn't you find at least ONE more recent source than those you linked to?
You might like to try:
http://tinyurl.com/lh9ppm
or
http://tinyurl.com/blqfgwdhttp://tinyurl.com/6eu89z2
and this one should be right up your street
http://tinyurl.com/5a45y3
As for your last source... The Daily Mail?? It explains it all really. I'll give you one from the Mail to enjoy but you might like to try the other links first.
http://tinyurl.com/clmuhr5
and yes, I enjoy a smoke sometimes just as some people enjoy a drink. The only difference is that my choice of intoxicant is 1000's of times safer than the Drugs the Government peddle!